How long does a fish have a memory

The memory of the fish can last for about 1-3 months.

Through training, it is also possible to strengthen their memory. People have experimented with putting a fish in the water, approaching it with a special device, causing an electric shock, and then waiting for 20 seconds before giving the electric shock, at which time the fish will be very frightened and have a tendency to avoid it. After a month's interval, when the experiment continued, the fish would still dodge.

Fish is one of the most common vertebrates, many people may think that fish have a very short memory, even only a few seconds, in fact, the memory of fish is much more than a few seconds, according to the "Proceedings of the National Academy of Sciences" records, fish memory varies from a few days to several years.

Many people think that fish have low intelligence and poor memory, and some people say that "fish have only seven seconds of memory", so how long does fish have memory?

According to the Proceedings of the National Academy of Sciences, fish have memories that can be as short as three days and as long as at least three months, depending on the type of fish.

Fishes are the oldest vertebrates, and the earliest known fish fossils were found in the Late Cambrian strata about 500 million years ago.

At present, there are about 32,100 named fish species in the world, mainly distributed in marine and freshwater, and two-thirds of the fish in the ocean.

Most of the fish are cold-blooded, very few are warm-blooded, breathe with gills, have jaws and fins, and the extant fish can be divided into two populations: cartilaginous fish and bony fish.

The fish can remember things for up to 1 to 3 months, and with continuous training, it can remember for a longer time. Fish have a short memory of an object, but after multiple contacts, it can make it repeat the memory.

Usually smart fish have a quick reaction time, while stupid fish have a slow reaction time and a short memory. The memory of the fish can last up to 1 to 3 months, not only 7 seconds as the popular say, and it is often repeated constantly, and the fish is trained, it can remember for a longer period of time, and produce various conditioned reflexes.

1. Most people think that the memory time of goldfish is only 7 seconds, but in fact, the memory time of goldfish is not only a few seconds long, In 2003, the School of Psychology of Pulley Sedan Zhengfang University conducted an experiment on the memory time of goldfish, and the results proved that the memory time of goldfish has at least 3 closed and slippery moons, and can distinguish the shape, color and sound of different objects, the experimental method is to fix a lever in the water, this lever is only 1 hour a day in the water, Train the goldfish to push this lever at this specific time, if the goldfish can remember this time and be able to push the lever, it will get food as a reward, the result is that the trained goldfish quickly know to push this lever at the exact time in order to get food, they can eat food at a specific time;

2. Fish, as an early species of vertebrates, have a rather unique evolutionary position, so there are many scientific studies on fish memory, although the types of fish used as experimental materials are not the same, the experimental methods and specific purposes are not the same, the task of testing human intelligence is obviously too difficult for fish, so it is really a bad record for the fish, which may also be one of the reasons for the origin of people's views on fish memory.